#include <stdio.h>
int main()
{
	int a, b,x;
	printf("input a and b:");
	scanf_s("%d%d", &a, &b);
	x = a;
	a = b;
	b = x;
	printf("the new a=%d\n", a);
	printf("the new b=%d\n", b);
	return 0;
}